| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Cioffi, Fiamma (13)
|
MREAST |
1:07.52 |
1:10.02 |
2.50 |
| 2 |
Chen, Ella Y (14)
|
MREAST |
1:10.18 |
1:13.58 |
3.40 |
| 3 |
Cabello, Mackenzie E (12)
|
MREAST |
1:14.66 |
1:15.81 |
1.15 |
| 4 |
Kohli, Eshani (12)
|
MREAST |
1:16.93 |
1:16.80 |
-0.13 |
| 5 |
Iacobazzi, Michela (15)
|
MREAST |
1:14.49 |
1:17.51 |
3.02 |
| 6 |
Antman, Sabrina L (17)
|
MREAST |
1:10.16 |
1:18.20 |
8.04 |
| 7 |
Langerfeld, Julia A (11)
|
MREAST |
1:15.96 |
1:18.29 |
2.33 |
| 8 |
Chen, Heidi Y (11)
|
MREAST |
1:16.40 |
1:19.30 |
2.90 |
| 9 |
Wang, Melissa R (13)
|
MREAST |
1:20.50 |
1:20.23 |
-0.27 |
| 10 |
Gordon, Jessica B (16)
|
MREAST |
1:16.14 |
1:23.15 |
7.01 |
| 11 |
Riley, Emily C (15)
|
MREAST |
1:25.16 |
1:26.55 |
1.39 |
| 12 |
Campanelli, Violet M (11)
|
MREAST |
1:32.90 |
1:28.98 |
-3.92 |
| 13 |
Barowsky, Mischa E (10)
|
MREAST |
1:29.99 |
1:32.76 |
2.77 |
| 14 |
Sheldon, Stella A (12)
|
MREAST |
1:35.56 |
1:36.48 |
0.92 |
| 15 |
Djokovic-Farrugia, Lina M (10)
|
MREAST |
1:41.66 |
1:42.72 |
1.06 |